September Weather in Alden, United States

Last updated: June 24, 2025

In Alden, United States, the average temperature in September hovers around 19°C (67°F). While the mercury can dip to a chilly 3°C (38°F), it can also soar up to a warm 34°C (94°F). Expect about 120 mm (4.7 in) of precipitation over 10 days, coupled with an average humidity of 75%. Stay prepared for a mix of warmth and occasional showers!

September Temperature in Alden

In September in Alden, the average temperature is 19°C (67°F). The maximum can reach 34°C (94°F), while the minimum can drop as low as 3°C (38°F). This range makes Alden an ideal destination for travelers seeking both warm days and cool evenings.

September Weather in Alden: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Alden, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alden, September typically has an average temperature of 19°C (67°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (38°F).

Data source: Temperature data for Alden generated using information from the Copernicus Climate Change Service.

September Precipitation in Alden

In Alden in September, the precipitation amount is 120 mm (4.7 in) spread over a duration of 10 days.

September Precipitation Trends in Alden

The chart displays monthly precipitation patterns in Alden, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Alden, September typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Alden

In Alden in September humidity is 75%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel invigorating yet slightly sticky, as you navigate through the vibrant streets or scenic landscapes.

September Average Humidity in Alden

This chart illustrates the average monthly humidity levels in Alden, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Alden is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alden

In Alden in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Alden.

Maximum UV Index Levels in Alden for September

The chart shows the monthly maximum UV Index (UVI) for Alden in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Alden typically reaches 8, which falls under the very high exposure category.

Data source: Alden September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Alden Compares to Other Months

Weather in Alden varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Alden, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Alden, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	35 mm (1.4 inches)	82%	moderate
February Weather	-7°C (20°F)	46 mm (1.8 inches)	84%	moderate
March Weather	3°C (37°F)	71 mm (2.8 inches)	80%	moderate
April Weather	8°C (47°F)	76 mm (3.0 inches)	81%	very high
May Weather	16°C (61°F)	166 mm (6.5 inches)	74%	very high
June Weather	23°C (73°F)	113 mm (4.4 inches)	80%	extreme
July Weather	24°C (75°F)	89 mm (3.5 inches)	80%	very high
August Weather	22°C (72°F)	88 mm (3.5 inches)	77%	very high
September Weather	19°C (67°F)	120 mm (4.7 inches)	75%	very high
October Weather	10°C (51°F)	122 mm (4.8 inches)	80%	high
November Weather	2°C (36°F)	44 mm (1.7 inches)	87%	moderate
December Weather	-2°C (29°F)	36 mm (1.4 inches)	83%	moderate